Free Tank Vehicles (N) CDL practice questions

Sample questions from this test

1. A Class A or B driver needs the tank endorsement to haul a liquid in a tank attached to the vehicle when each tank holds more than ___ gallons and the total is 1,000 gallons or more.
   1. 100
   2. 119
   3. 500
   4. 1,000
   Show answer

   119

   The rule is more than 119 gallons per tank and an aggregate of 1,000 gallons or more.

2. When does a Class C vehicle need a tank endorsement?
   1. Whenever it carries any liquid
   2. Never; tank endorsements are only for Class A
   3. Only when it tows a trailer
   4. When it hauls hazardous materials in liquid or gas form in tanks of the regulated size
   Show answer

   When it hauls hazardous materials in liquid or gas form in tanks of the regulated size

   For Class C, the tank endorsement is needed when hazardous liquids or gases are carried in tanks of the listed capacities.

3. Because tank vehicles come in many types, where should you learn how to inspect your particular tank?
   1. From another driver's truck
   2. In the vehicle's operator's manual
   3. On the placard
   4. From the bill of lading
   Show answer

   In the vehicle's operator's manual

   Check the operator's manual to know how to inspect your own tank vehicle.

4. Where should you look most closely for leaks on pipes, connections and hoses?
   1. At the middle of each hose
   2. On the cab roof
   3. Around the joints
   4. Under the fuel tank cap
   Show answer

   Around the joints

   Look for leaks on pipes, hoses and fittings; joints are the most common spot.

5. What should you check about the vents on a tank?
   1. That they are taped shut
   2. That they are removed for the trip
   3. That they face forward
   4. That they are clear so they work correctly
   Show answer

   That they are clear so they work correctly

   Keep vents clear so they work correctly.

6. Which item is on the list of special purpose equipment to check on a tank vehicle?
   1. Emergency shut-off system
   2. Air conditioner
   3. Spare headlight bulbs
   4. Load locks
   Show answer

   Emergency shut-off system

   Emergency shut-off systems are on the special equipment list, with vapor recovery kits, grounding/bonding cables and built-in extinguishers.

7. Vapor recovery kits on a tanker should be:
   1. Removed before loading
   2. Used only in winter
   3. Kept in the cab sleeper
   4. Checked to be sure they work
   Show answer

   Checked to be sure they work

   If your vehicle has vapor recovery kits, make sure they work.

8. How should a tanker take highway curves and on-ramp or off-ramp curves?
   1. Well below the posted speed
   2. At exactly the posted speed
   3. Slightly above the posted speed
   4. At the highway speed limit
   Show answer

   Well below the posted speed

   Tests show tankers can roll over at posted curve speeds, so go well below them.

9. When the wave of liquid hits the end of the tank after you stop, it tends to:
   1. Shove the truck the same way the wave is going
   2. Pull the truck backward only
   3. Lift the front wheels off the road
   4. Have no effect on a stopped truck
   Show answer

   Shove the truck the same way the wave is going

   The wave pushes the truck the way the wave is moving; on ice it can shove a stopped truck into an intersection.

10. How are bulkheads different from baffles?
    1. Bulkheads have holes; baffles are solid
    2. They are the same thing
    3. Bulkheads are solid walls that divide a tank into smaller tanks; baffles have holes that let liquid through
    4. Bulkheads are only used in food tanks
    Show answer

    Bulkheads are solid walls that divide a tank into smaller tanks; baffles have holes that let liquid through

    Bulkheads divide a tank into separate compartments; baffles are bulkheads with holes that slow surge.

11. Why do food tanks usually have no baffles?
    1. Baffles are too heavy
    2. Sanitation rules forbid them because they make the tank hard to clean
    3. Food does not surge
    4. Baffles cost too much
    Show answer

    Sanitation rules forbid them because they make the tank hard to clean

    Sanitation regulations forbid baffles because the inside of the tank would be hard to clean.

12. What is outage?
    1. The time a tank is out of service
    2. A leak at the outlet valve
    3. Room left in a tank for the liquid to expand
    4. The weight of an empty tank
    Show answer

    Room left in a tank for the liquid to expand

    Outage is the space left so liquid can expand as it warms. Never load a cargo tank totally full.

13. Which is NOT one of the three things that decide how much liquid to load into a tank?
    1. How much the liquid will expand in transit
    2. The weight of the liquid
    3. Legal weight limits
    4. The color of the liquid
    Show answer

    The color of the liquid

    The amount depends on expansion, the liquid's weight and legal weight limits.

14. To help control surge when coming to a stop, you should:
    1. Keep steady pressure on the brakes and not release too soon
    2. Pump the brakes quickly
    3. Release the brakes just before the truck stops
    4. Shift to neutral and coast
    Show answer

    Keep steady pressure on the brakes and not release too soon

    Keep steady brake pressure and do not release too soon when stopping.

15. What may happen if you steer quickly while braking in a tank vehicle?
    1. The tank will empty
    2. The brakes will fade instantly
    3. The vehicle may roll over
    4. Nothing, if the tank is baffled
    Show answer

    The vehicle may roll over

    Quick steering while braking can cause a tanker to roll over.